Pets

I adopted one male dog as a puppy and had him fixed at about 6 months old. When he was about a year old we rescued another male dog from a high kill shelter. He was about 4 at the time, but had to be fixed before they would release him from the shelter. I few years later we moved and our new landlord had a couple of dogs. He swore they were fixed, but one of his females went into heat. My older dog knew what to do with that since he wasn't fixed early on. He started to go after the female in heat. My younger dog was larger and he caught the scent as well. He mounted the female and she stood for him. Anyway, I've seen this happen with cats too. I don't think there's really a definitive answer to your question. It could really go either way. The bottom line is that a fixed dog can't reproduce and that's what it's really all about.